Export Transparency

I noticed that cel vinyl (and presumably other brushes using alpha mask) can convert the textures to properly transparent
using alpha test and blend. Not currently an option on the brushes. Quick test to confirm XR export, and it worked.
Gets rid of the black mask border

Is this something I can change through modifying the shader?
Noted this is apparently marked legacy, so may be performance reasons or others?
If not a good idea, might make sense to do that in the export workflow?
image.png
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